Pin for insulators



W. D. KYLE PIN FOR INSULATORS Nov. 24 1925.

Filed Nov. 15. 1922 WITNESSES IN VENTOR mgw Patented Nov. 24, 1925.

UNITED STATES ATENT QFFICE.

WILLIAM D. KYLE, F MILIUAUKEE, WISCONSIN, ASSIGNOR TO LINE MATERIAL COM-IPANY, OF SOUTH MILWAUKEE, WISCQNfiIN, A. CORPORATION OF WISCONSIN.

PIN FOR INSULA'IORS.

Application f led Novembe 922. Serial No. 6Q1,070.

To all whom it may concern Be it known that I, WILLIAM D. KYLE, acitizen of the United States, and resident of Milwaukee, in the countyof Milwaukee and State of Wisconsin, have invented new and usefulImprovements in Pins for Insulators, of which the following is a description, reference being had to the accompanying drawings, which are a partof this specification.

The invention relates to insulator pins.

The object of the invention is to provide an insulator pin in which themetal pin is provided with soft metal portions threaded to receive theinsulator, the soft metal forming a cushion to prevent cracking of theinsulator when screwing it onto the pin and prevent its cracking due topossible contraction and expansion of the metal pin when in use.

The invent-ion further consists in the several features hereinafter setforth and more particularly defined by claims at the conclusion hereof.

In the drawing: Fig. 1 is a view of an insulator pin embodying theinvention, parts being broken away and parts being shown in section;Fig. 2 is a top view of the pin shown in Fig. 1; Fig. 3 is a sectiontaken on the line 33 of Fig. 1; Fig. 4 is a detail view of a modifiedform of insulator pin, parts being broken away and parts being shown insection; 5 is a top view of the insulator pin shown in Fig. 1; Fig. 6 isa detail view of a modified form of insulator pin, parts being brokenaway and parts being shown in section, and Fig. 7 is a top view of theinsulator pin shown in Fig. 6.

In each instance the insulator pin includes a metal pin member 8, havinga shank portion 9 threaded at its outer end 10, and a conical or taperedhead portion 11. The shank portion 9 is provided with a boss or flangeportion 12 so that the pin may be secured to a cross-arm 13, or othersuitable support, by a clamping engagement of said arm between theportion 12 and a clamping nut 14.

Referring to Figs. 1 to 3, inclusive, the head portion 11 is providedwith a plurality of longitudinally extending grooves 15 and a squareshoulder portion 16. A soft metal member 17 has strip portions 18preferably joined together at their top 19 and to a ring portion -20 atthe bottom, These strip portions 18 fit within the grooves 15 andpro]ect from the head with their outer edges 21 indented to form athread to receive the insulator 22. The ring portion 20 engages overshouldered portion 16 so that the strips are held between the top 19 andthe ring against longitudinal movement with respect to the head whiletheir key connection with the head prevents their lateral movement withrespect thereto. The member 17 may be cast separately and slipped overthe head and the ring portion 20 peened down against the base of thehead, or said member may be die cast onto the head.

In Figs. 4c and 5 I show the head provided with longitudinally extendingdovetail grooves 22 for separate strips 23 which have a fit in saidgroovesand have their outer edges 24: threaded to receive the insulator.The upper ends 25 of these strips may be upset into recesses 25 and thelower ends 26 upset into recesses 27 to prevent longitudinal movement ofsaid strips with respect to the pin member.

In Figs. 6 and 7 I show the head provided with longitudinally extendinggrooves 28 or receiving wires 29, preferably oval in cross-section, andprovided with indentations 30 to form a thread for the insulator. One ofthese wires 29 is bent upon itself over the head of the insulator andinto a transverse recess 31 formed in the head, and its ends are passedinto a transverse opening 32 at the base of the head and the other wireis similarly bent upon itself over the head of the insulator and into atransverse groove 33 formed in the head and its ends are passed into atransverse opening 34 at the base of the head, thus holding the wiresagainst longitudinal movement with respect to the head.

From the foregoing description it will be noted that in each instancethe soft metal cushion upon which the insulator is fitted is formed by aplurality of soft metal strips keyed to the head of the pin member andhaving their outer edges threaded to take the insulator, and thatprovision is made for preventing longitudinal movement of said stripsrelative to said pin member. It will also be noted that the slots in thehead are formed parallel to the inclined surface of the head and thestrips are thus inclined to provide atapered thread for the insulator.

The soft metal member 17 forms, in effect,

a sleeve "member surrounding the head ofthe pin "with the top 19abutting against the outer end of the head and the ring '20 abut- ;tixrgagainst thesh'ou'ldered portions of the inner end :of the head, thusretaining the soft metal member against longitudinal movement.

"What I claim as my invention is: g

1. In an insulator pin, the combination of a metal pin having a head,and longitudinally extending soft metal strips having a key-connectionwith said head and having inwardlyprojecting darts attheir endsto holdthem against longitudinal movement relative to said head, the outeredges of. said strips being indented to form threads for receiving aninsulator.

2. In an insulator pin, the combination of a metal pin "having a head"longitu dinall .ext ending soft metal strips having a key connectionwith said head and having outer indented edges iforming threads for theinsu'lator, and means for holding said'strips against longitudinalmovement relative to saidhead.

together at "their upper and lower ends over the top and beneath thebase oi; said head and having a key connection With said head andindented outer edges forming threads for the insulator.

4. In aninsulatorpin, the-combination ot a metal pin having a head,longitudinally extending soft metal strips having a key connection withsaid head and having outer indented edges forming threads to receive aninsulator, and uneans for holding said stripsagainst longitudinal andoutward radial movement relative to said head.

5QIn an insulator pin, the combination of a metal pin member having ahead, lougi- 'tudinally extending so'it metal Wire strips having a keyconnection with said head and indented outer edges forming threads forthe insulator, and means securing said strips against longitudinalmovement.

6. In an insulator pin, the combination of ,a metal pin member having aconical head. .a soft metal sleeve memberdisposed on said headand'having' peripheraliv -spacedlongituchnally-extending threadedportions with WillCll the'lnsulator engages, and-means for retainingsaid member-in place.

In testimony WhQTQOf,I aiiix my'sio nature.

WVILLIAM KYLE.

